Defensive publication

ABSTRACT

THIS INVENTION RELATES TO AN OPTICALLY BRIGHTENED MATERIAL COMPRISING AN ORGANIC MATERIAL TO BE BRIGHTENED AND AT LEAST ONE BRIGHTENING AGENT WHICH IS A N-ARYLPHTHALIMIDINE. ILLUSTRATIVE PHTHALIMIDINES EMPLOYED CAN BE REPRESENTED BY THE STRUCTURAL FORMULAS:   WHEREIN EACH OF R1 THROUGH R10 CAN BE: HYDROGEN; ALKYL, INCLUDING SUBSTITUTED ALKYL; ARYL, INCLUDING SUBSTITUTED ARYL; HALO; CYANO; AND THE LIKE; WITH THE LIMITATION THAT SAID SUBSTITUENTS BE FREE OF ANY FUNCTIONAL GROUPS WHICH EVOLVE GAS IN THE ZERWITINOFF TEST FOR ACTIVE HYDROGEN. IN A PREFERRED EMBODIMENT OF THE INVENTION, THE ALKLY AND ARYL GROUPS CAN HAVE FROM 1 TO ABOUT 12 CARBON ATOMS.

DEFENSIVE ULlCATiON UNITED STATES PATENT OFFICE Published at the requestof the applicant or owner in accordance with the Notice of Dec. 16,1969, 869 0.6. 687. The abstracts 01 Defensive Publication applicationsare identified by distinctly numbered series and are arrangedchronologically. The heading of each abstract indicates the number ofpages of specification, including claims and sheets of drawingscontained in the application as originally filed. The files of theseapplications are available to the public for inspection and reproductionmay he purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Oflice makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED JUNE 22, 1971 T887,030 OPTICAL BRIGHTENING COMPOSITIONS JohnAlbert Ford, Jr., and John Frederick Stenberg, both Eastman Kodak (30.,Kodak Park Division, Rochestel, N.Y. 14650 Filed Sept. 11, 1970, Ser.No. 71,409 Int. Cl. G03c 1/92 US. Cl. 96--82 No Drawing. 18 PagesSpecification This invention relates to an optically brightened materialcomprising an organic material to be brightened and at least onebrightening agent which is a N-arylphthalimidine. Illustrative phthalimidines employed can be represented by the structural formulas:

Rs Rm l a R,- l

I 0 R10 I R, R, i R; i

Ra- -R1 I R. R5 R: Rm 0 1 and 0 R3 R10 I I" b/\ I f I l 0 Rs l R5wherein each of R through R can be: hydrogen; alkyl, includingsubstituted alkyl; aryl, including substituted aryl; halo; cyano; andthe like; with the limitation that said substituents be free of anyfunctional groups which evolve gas in the Zerwitinoif test for activehydrogen.

In a preferred embodiment of the invention, the alkyl and aryl groupscan have from 1 to about 12 carbon atoms.

